Installation Guide
www.usaprocom.com
200199-01B14
INSTALLATION
Figure 10 - Equipment Shutoff Valve
CHECKING GAS CONNECTIONS
Open
Closed
Equipment 
Shutoff Valve
 WARNING: Never use an open 
ame to check for a leak. Apply 
a  noncorrosive  leak  detection 
uid to all joints. If bubbles form, 
there is a leak. Correct all leaks 
at once.
 WARNING: Test all gas piping 
and connections for leaks after 
installing or servicing. Correct 
all leaks at once.
PRESSURE TESTING GAS SUPPLY PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)
1.  Disconnect heater with its appliance main 
gas valve (control valve) and equipment 
shutoff valve from gas supply piping sys-
tem. Pressures in excess of 1/2 PSIG will 
damage heater regulator.
2.  Cap off open end of gas pipe where equip-
ment shutoff valve was connected.
3.  Pressurize supply piping system by either 
opening  propane/LP  supply  tank  valve 
for propane/LP gas or opening main gas 
valve  located  on  or  near  gas  meter  for 
natural gas or using compressed air.
4.  Check all joints of gas supply piping sys-
tem. Apply  noncorrosive  leak  detection 
uid  to  all  joints.  If  bubbles  form,  there 
may be a leak.
5.  Correct all leaks at once.
6.  Reconnect heater and equipment shutoff 
valve to gas supply. Check reconnected 
ttings for leaks.
Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)
1.  Close equipment shutoff valve (see Fig-
ure 10).
2.  Pressurize supply piping system by either 
opening  propane/LP  supply  tank  valve 
for propane/LP gas or opening main gas 
valve  located  on  or  near  gas  meter  for 
natural gas or using compressed air.
3.  Check all joints from gas meter to equip-
ment  shutoff  valve  for  natural  gas  or 
propane/LP supply to equipment shutoff 
valve  for  propane/LP (see  Figure  11  or 
12). Apply a noncorrosive leak detection 
uid to all joints. Bubbles forming show a 
leak.
4.  Correct all leaks at once.
Control Valve 
Location
Control Valve 
Location
Equipment 
Shutoff Valve
Equipment Shutoff Valve
External Regulator
Propane/LP 
Supply Tank
Figure 11 - Checking Gas Joints for 
Propane/LP Gas
Figure 12 - Checking Gas Joints for 
Natural Gas
Gas 
Meter
External 
Regulator 
Supplied 
by Gas 
Supplier










